Enobil Labs Port Connection Helper

Generate terminal connectivity checks to test if your client machine can access remote ports

Why Use This Port Helper?

💻 Local Client Reachability
Unlike server-side port checkers that test Cloudflare's connectivity, this tool lets you execute commands from your own machine to verify your local internet and firewall access.
🔒 Absolute Privacy
Since the command generator runs 100% locally in your browser, your database hostnames, servers, and IP addresses are never sent to our servers.
⚡ Fast Preset Configurations
Instantly load common port values for database instances (Postgres, MySQL, Redis) and standard network protocols with a single click.
📖 Built-in Interpretation Guides
Contains specific code output examples for success and failure outcomes for all commands, helping you diagnose the issue immediately.

Frequently Asked Questions

❓ Why can't this tool check the port directly from the browser?

Web browsers run in a highly secure sandbox environment that prevents JavaScript from opening raw TCP sockets. They also maintain a restricted port list (blocking ports like 22 for SSH or 25 for SMTP) to prevent local network scanning and cross-site scripting abuse. Generating a native terminal command lets you test actual network connectivity from your client's machine.

❓ What is the difference between this and a standard Ping?

A standard ping uses the ICMP protocol to verify if a machine is online, but it does not check if specific applications (like web servers or databases) are running. Additionally, many modern networks block ICMP entirely. A TCP port check tests connectivity to the exact port where the service is running, proving the service is reachable.

❓ What does 'Connection Refused' mean?

A 'Connection Refused' error means your client machine successfully reached the target host, but the target host is actively rejecting the connection. This typically indicates that either the service (like PostgreSQL or SSH) is not running on that port, or it is not listening on public interfaces.

❓ What does 'Connection Timed Out' mean?

A 'Connection Timed Out' error means your client machine sent the connection request, but received no response at all before the connection timed out. This is a classic sign of a firewall (either on the client side, network router, or target host cloud firewall) dropping the traffic completely.